Carbureter



F. M. FURBER.

CARBURETER.

APPLICATION FILED JULY 3,1916.

Patented Nov. 8,

gas are often usedfor this purpose. these are unavailable,

UNITED STATES PATENT OFFICE.

FREDERICK M. FURBER, OF REVERE,

MASSACHUSETTS, ASSIGNOR, BY MESNE ASSIGN- MEN'IS, TO UNITED SHOE MACHINERY CORPORATION, OF PATERSON, NEW JERSEY,

A CORPORATION OF NEW JERSEY.

CARBURE'IER.

To all whom it may concern:

Be it known that I, FREDERICK M. FURBER, a citizen of the United States, and resident of Revere, in the county of Suffolk and State of Massachusetts, have invented certain Improvements in Carbureters, of which the following description, in connection with the accompanying drawings, is a specification, like reference-characters on the drawings indicating like parts in the several figures.

This invention relates to machines for impregnating a current of gas with. a volatile hydrocarbon in order to form a combustible or explosive mixture, and in particular to carbureters which impregnate air with gasolene to make combustible gas for heating or lighting purposes.

It is necessary in many arts, for example in shoe manufacture, to heat various tools. Electricity, steam and ordinary illuminating When or too costly, gasoleneimpregnated air is often used. Such gas is also frequently used as an illuminant.

It is found that the gasolene now commercially obtainable consists in part of heavier components, the vapor pressure of which at ordinary factory temperatures is not high enough to cause sufilcient evaporation into air at 16 or 18 pounds (absolute) pressure to make a combustible mixture. The lighter components of the gasolene evaporate rapidly and make a satisfactory gas, but unless the apparatus is continually refilled with fresh gasolene it is found that the gas becomes poorer and poorer until it finally becomes incombustible, with the heavier parts of the gasolene still remaining in the carbureter.

In order to evaporate the gasolene completely and in sufiicient quantities it is necessary to apply heat to theevaporating chamber. It is regarded as unsafe to use a flame for this purpose and electric heat is unavailable in many places. It is an object of my invention to obviate the difficulty described and to provide an apparatus which shall be safe and convenient in use.

To this end a feature of my invention consists in a carbureter having a hydrocarbon chamber and a gas compressor in thermal communication with said chamber so that Specification of Letters Patent.

. Application filed July 3, 1916.

barometric feed principle.

Patented Nov. 8, 1921. Serial No. 107,344.

Figure 1 of the drawing shows in section apreferred embodiment of the invention.

Fig. 2 illustrates a modification. The gas chamber 1, having the outlet valve 2 for removal of the gas formed in the apparatus, contains a cup 3. The upper portion of the cup3 is broadened out into a pan 4. The nipple 5 communicates with the chamber 1, extends below the top of the pan 4, and contains the spring pressed valve plunger 6 which seats upward at the top of the nipple. It has a rod 6 which strikes the bottom of the valve chamber when the valve opens and arrests the downward movement of the plunger. The supply can or filler 7 has a similar valve 8, and the can 7 and nipple 5 are furnished with complemental portions of a bayonet joint 9 so that the can may be fitted securely down on the upper end of the nipple and fastened. The rod 10 which forms a part of the valve plunger 8 extends through the channel formed by the nipple and can and when the can is fitted over the nipple and forced down the rod 10 unseats the lower valve plunger, the spring of which is weaker than that of the upper valve. The lower valve plunger descends until its rod 6 contacts the bottom of its chamber, and the completion of the engagement of the can with the nipple unseats the upper valve.

Gasolene will flow from the can 7 down into the pan .4 and cup 3 until its level reaches the bottom of the nipple 5, when a constant level will be maintained on the The gasolene in the carbureter can therefore never exceed a definite quantity. It will be clear also that there will be no danger of ignition or accident'in filling because both valves at 6 and 8 remain closed at all times except when the sion which takes place is somewhere between supply can and the nipple are well engaged.

A shaft 11 journaled inthe casing of the machine and .driven by the pulley 12, reciprocates the piston 13 in the cylinder 14. The piston has a' spring pressed ball valve 15 in its lower end. Between the extreme positions of the piston a channel 16 leads out of the cylinder, having two valved outlets 17,

18. The valve at 17 is set at the pressure it is desired to maintain in the gas chamber 1. The valve at 18 is set to open at very low pressure. When the piston descends toward the channel 16, the compressed air below it will flow through the channels 16, 18 until the pressure in the chamber 1 reaches the point where the valve at 17 opens and lets the compressed air out into the room. When the valve 2 is open a continuous current of air is thus kept flowing through the gas chamber, over the gasolene in the pan 4.

The lower end of the cylinder 14 is extended and constricted at 19, and the cylin- .der is surrounded by a water jacket 20, having. an outlet valve 21. This water jacket and cylinder extension 19 extend downward into the cup 3. During the lower part of the stroke of the piston 13, after it passes the channel 16, it compresses the air in the extension 19, and the temperature of this air rises. Heat consequently begins to flow through the walls of the cylinder into the water jacket, through which it is communicated to the gasolene in the cup 3; As the lpressure rises in the extension 19 some of the eated air will leak past the piston, and as the piston rises air enters through the valve 15 to replace this air and that which has been forced out the channel 16. The air in the extension 19 is, therefore, being continually renewed, to a certain extent. The purpose of the water jacket 20 is to preventthe temperature of the gasolene and consequently its vapor pressure from rising above a safe limit. The gasolene can get no hottor than boiling water, and its vapor pressure at'this temperature is not dangerous.

If desired, an escape valve 22 may, be placed at the bottom of the extension 19 to. permit a large quantity of the compressed heatedair to escape, .so that the heating portion of the machine will work exactly as the familiar bicycle pump. That is, the expanber will be returned'by them to the air in the chamber. It has been found,'however, that the apparatus operates satisfactorily without the incorporation of this feature.

It is clear, also, that the apparatus works of the down stroke before the piston reaches the channel 16.

What seems to happen is that the compresand 22, and by leakage, to a certain extent,

so that its expansion and consequent cooling take place at a distance from thecylinder, and the heat communicated to the cylinder is not all reclaimed. The very rapid recurrence of the cycle and consequent rapid multiplication of the heat quantity imparted in one cycle enables the cylinder walls to transmit a considerable quantity of heat to the hydrocarbon.

Having described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a machine of the class described, an evaporating chamber and a gas compressor located in said chamber whereby some of the heat of compression may be utilized to produce a substantial rise in temperature in the liquid in the evaporating chamber.

2. In a machine of the class described, an evaporating chamber, a gas compressor and a water jacket surrounding said compressor, the jacket being arranged in direct thermal communication with the liquid in the chamber.

3. In a machine of the class described, an,

compression may be utilized to heat theliquid in the evaporating chamber.

4. In a machine of the class described, a

hydrocarbon chamber, means for maintaining a shallow body of hydrocarbon in said chamber, a cylinder having an opening into said chamber, said cylinder extending into said chamber, and a iston in said cylinder.

5. Ina machine 0% the class described, a hydrocarbon chamber, opening into said chamber, to cause a flow of air over hydrocarbon in said chamber, said cylinder extending into said chamber, and a piston in said cylindertraveling across said opening.

6. In a machine of the class described, a hydrocarbon chamber, a water jacket in said chamber, and a gas compressor enveloped by said water jacket. I v

7. In a machine of the class described, a hydrocarbon chamber, a pen in said chain- 65 like the bicycle pump during the upperpart her having adepressed cup, a gas compressor a cylinder having an in said cup, the compressor to flow over hydrocarbon in d and means for causing gas from said pan.

8. In a machine of the class described, a low pressure hydrocarbon chamber, a cylin- (ler extending into said chamber, a piston in the cylinder to compress air therein, an outlet pipe from the cylinder leading into the.

hydrocarbon chamber, and a relief valve in said pipe permitting escape of air when the pressure in the chamber has reached a predetermined point.

9. In a machine of the class described, a

stand pressures low pressure hydrocarbon chamber, a cyliner extending lnto said chamber, a piston in the cylinder to compress air therein, an outlet pipe from the cylinder leading into the hydrocarbon chamber, the cylinder, piston and pipe being constructed and arranged to of several atmospheres, and a relief valve in said pipe permittlng escape of air when the pressure in the chamber has reached a predetermined oint.

In testimony whereof have signed my name to this specification,

FREDERICK M. FURBER. 

